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post #11 of 17 (permalink) Old 11-13-2013, 11:10 PM
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Originally Posted by Paul Waite View Post
Thank you all for thoughts on this. I can see that the pipes have been changed (not stock) but I didn't notice a brand name on them. They may be a cheap quality pipe but they are very quiet. The bike has a slight hesitation when rolling on the throttle but otherwise runs smoothly. The owner has not had it on the road for two years (although he says he has regularly run it around the neighborhood) so there is likely some junk in the carbs. So, it doesn't sound like a deal killer then.
maybe not a deal breaker but a different set of pipes is in order. This is not caused by late timing or a lean condition. Not that far down in the exhaust system. You would have to turn the complete exhaust system blue including the x-box or H-box or torque box or whatever you want to call it and that is not really going to happen, all the way down to the discolored part of the muffler. there is some sort of restriction in that pipe and if it is normal and not really a problem then the quality of the chrome where the baffle is must be really cheap. I am not familiar wit the mac brand of pipes but I think I would be looking for a good set of stock pipes.

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post #12 of 17 (permalink) Old 11-14-2013, 03:34 AM
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Honda uses double skin on their exhaust, that just can't turn blue. Unless something is seriously wrong. And hot.
Aftermarket is often single skinned, and will turn blue quite easily.
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post #13 of 17 (permalink) Old 11-14-2013, 10:55 AM
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My 79 isn't like this but more like a blue fade on the right stock pipe, what could that be from?
Same thing, restriction/heat build up. It's just like you see on a lot of bikes with exposed chrome headers and straight pipes. Not rejetting leans the fuel mix and causes bluish discoloration usually at
Bends in the pipe but sometimes the whole pip

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post #14 of 17 (permalink) Old 11-14-2013, 01:37 PM
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Honda uses double skin on their exhaust, that just can't turn blue. Unless something is seriously wrong. And hot.
Aftermarket is often single skinned, and will turn blue quite easily.
All Hondas mufflers are double walled but the header pipes are not and can turn colors fairly easily if it's running too lean. That photo obviously isn't an illustration of what I'm talking about, but it can happen.

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post #15 of 17 (permalink) Old 11-15-2013, 02:27 AM
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All Hondas mufflers are double walled but the header pipes are not and can turn colors fairly easily if it's running too lean. That photo obviously isn't an illustration of what I'm talking about, but it can happen.
On GW and some others that are covered up anyway, Honda have used single skin on headers, but look at any uncovered straight four with steel crome exhaust.
Headers are double skinned, and never blue. Unless there´s been a problem at one time.
BMW as an example goes single skinned on headers, and are blue quite a long way from the head. Absolutely normal in that case.

I can just compare my cb750k1 project from 1970, and my R100RS from 1982.(Now just sold)

Going a bit off topic now. Sorry.
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post #16 of 17 (permalink) Old 11-18-2013, 05:51 PM
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I am seriously looking into purchasing an '88 Goldwing with only 40K on it. Looked it over tonight and was pleased with what I saw and heard but only one thing creates hesitation. The front of the exhaust pipes are discolored--burnt looking (see picture below). I've been looking at numerous 1500's and I don't see that on others. What would cause this? Is it a concern? Thanks, in advance, for your help.

Attachment 99225
Hello Paul! Good to hear you might be getting your hands on a GL1500. We offer Torq Master's Hollywood and Daytona Mufflers for that bike. Both are great for their price. Check out our customer's reviews to hopefully help you decide on a set of mufflers if you do get the bike. Please don't hesitate to give us a call or email with any questions at 800.260.4050 or parts@cyclegiant.com
Hollywood Mufflers: http://wingstuff.com/products/779-ho...ufflers-gl1500
Daytona Mufflers: http://wingstuff.com/products/1386-d...ufflers-gl1500

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post #17 of 17 (permalink) Old 11-18-2013, 06:36 PM
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